Arithmetic and control unit



FIG. 1 is a front elevational view of an arithmetic and control unitshowing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof.

FIG. 7 is a front elevational view, wherein the display or screenportion is in the open position;

FIG. 8 is a rear elevational view thereof;

FIG. 9 is a right side elevational view thereof;

FIG. 10 is a top plan elevational view thereof; and,

FIG. 11 is a front perspective view thereof.

The ornamental design for an arithmetic and control unit, as shown anddescribed.